Apache Ranger: OS Command Injection via Username in UnixUserGroupBuilder

published 2026-08-10 2 mo ago modified 2026-10-23 16 d ago also EUVD-2026-55254 , GHSA-6qc3-v8fv-fv9j

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 2.6%; EPSS 2.6% chance of exploitation in 30 days, percentile 85%
public exploits: 0; none known

Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability in Apache Ranger.

This issue affects Apache Ranger: from 0.6 through 2.8.

Patch / fix

fixed in 2

apache ranger 2.9.0
org.apache.ranger unixusersync 2.9.0

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: total
Assessed: 2 mo ago (2026-08-12)

Exploit prediction

2.63% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
maven	org.apache.ranger:ranger	>=0.6.0, <=2.8.0	no fix listed

Affected products

Apache Software Foundation Apache Ranger

Classification

Weakness

CWE-77 Improper Neutralization of Special Elements used in a Command

References

lists.apache.org /thread/99ysjqcmz950o3jgm6pqx1wb696onzq7
vendor-advisory, web, mailing-list
openwall.com /lists/oss-security/2026/08/09/2
web, mailing-list, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2026-28672
advisory
github.com /apache/ranger
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary